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'cgo' is Go's bridge to using C code. As such it is just as unsafe as writing C code directly.
=={{header|
The ''security level'' (default: 0) can be increased to 1 by executing:
<syntaxhighlight lang="j">(9!:25) 1</syntaxhighlight>
Afterwards, all verbs able to alter the environment outside J are prohibited. See the [https://code.jsoftware.com/wiki/Vocabulary/ErrorMessages#security J Community Wiki] for details regarding the restrictions.
=={{header|Jsish}}==
The '''jsish''' interpreter allows a '''-s''', '''--safe''' command line switch to restrict access to the file system.
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